.background {
    width: 100%;
    height: 100%;
    background: url("https://www.eveningwater.com/my-web-projects/jQuery/15/img/testImg-00.jpg")no-repeat center/cover;
    filter: blur(0);
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
}
.loading-text {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    color: #fff;
    font-size: 2rem;
}